Black tank flush location

[izzaboomer]

My 2016 Sunseeker 3010ds black tank flush seems to be stopped up. I have tracked the line to the back flow valve. Checked BFV working fine. Have read about sprayer being clogged. Where is sprayer and how do I get to it?

[Bama Rambler]

The spray head is inside the tank, usually on one end. Hopefully on the end away from the drain line.

[fonzie]

On a few occasions, I had to wait a few minutes with water hooked up to black flush before it started to operate as it was clogged, pressured water did soften it up and worked properly after....make sure you stay there when waiting so it does not fill black tank once it starts......